Can the effects of UV light on folate explain the full variation of human skin color that exists among human populations today? Explain your reasoning
Human skin colour is due to a pigment called melanin. The melanin pigment is present in outer layer of skin cells. UV light causes increase in production of melanin resulting in darker skin shade.
Why the human skin colour varies?UV radiation can cause photolysis of folate. This can lower the level of folate. If the level of melanin increase, it will stop the breakdown of folate. This will result in variation of colour in high intensive UV areas.
Thus, it can be concluded that increased UV radiation can cause variation in human skin colour.
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Generally, epidemiological studies _______.
a. establish causation.
b. prove correlations.
c. cannot determine cause-and-effect relationships.
d. are science-based research efforts that examine two variables.
Answer:
the answer is c
Explanation:
Generally, epidemiological studies cannot determine cause-and-effect relationships.
What is the simple definition of epidemiology?Epidemiology is the method used to find the health consequences of a population and the causes of illness. In epidemiology, patients are communities, and individuals are seen collectively.
Epidemiological studies provide the basis for disease control and prevention by tracking disease prevalence, characterizing natural history, and identifying disease determinants or causes. .. Define risk factors for illness and preventive medicine goals.
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Define ecological predation
Answer:
Brainliest pls
Explanation:
In predation, one living being kills and consumes another. Predation gives the energy to draw out the life and advance the multiplication of the organic entity that does the killing, the hunter, to the hindrance of the creature being consumed, the prey. Predation impacts living beings at two biological levels.
How does the malachite green stain enter an endospore?.
Answer:
Because of their tough protein coats made of keratin, spores are highly resistant to normal staining procedures. The primary stain in the endospore stain procedure, malachite green, is driven into the cells with heat
please look at the screenshot
Answer:
i think the answer is A becouse i think the both are stags
Suspended sediments in the water absorb heat?
True
False
Answer:
TRUE
Explanation:
Suspended silt diminishes the entrance of light into the water. This influences angle bolstering and tutoring hones and can lead to decreased survival.
what does an energy pyramid represent? by a food web and energy pyramids
Answer:
It's a graphical representation of the energy found within the tropic levels of an ecosystem.
Explanation:
It was so bad I give you a zero but that’s not possible so I give you…
Answer:
a one...
Explanation:
a one...............
what do you mean by organic evolution
Answer:
organic evolution is the theory
that more type
50 POINTS AND WILL BRAINLIEST!!!
Answer each part of this question completely in the space provided.
Use the data to explain the changes in phenotypic frequency from generation 1 to 3.
Do you think this population is in Hardy-Weinberg equilibrium? Provide reasoning to support your claim.
The phenotypic frequency from generations 1 to 3 shows there are naturally more individuals with the dominant trait. Moreover, changes in frequency show this population does not have Hardy Weinberg equilibrium.
What are the changes in phenotypic frequency?Phenotypic frequency refers to how common a trait is in one population. In this case, the number of individuals with a recessive vs those with a dominant trait.
From the information provided in the chart, we can see in the first three generations there is a higher number of individuals with a dominant trait, which is genetically natural, and this occurs even as the population grows.
Is there Hardy Weinberg Equilibrium?Hardy Weinberg Equilibrium is a principle that establishes under normal conditions phenotypic frequency should be constant. This does not occur in this population because by generation 6 there is almost the same number of individuals with a dominant and a recessive trait, which shows phenotypic frequency is changing.
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What are the DNA pyrimidine bases?
A. adenine and thymine
B. cytosine and thymine
C. adenine and cytosine
D. adenine and guanine
Answer:
the b cytosine and thymine is the correct answer
A person trying to develop higher self-esteem should attempt to choose friends who __________. A. Have a high social status B. Try to change your bad habits C. Accept who you are D. Are extremely wealthy Please select the best answer from the choices provided. A B C D.
Answer:
the answer is c accept who you are thats how you get a higher self esteem
Answer:
C. - accept who you are
Explanation:
100 hundo percentage
In contrast, what percentage of the water entering the small intestine is absorbed by the large intestine?.
We have that the, the large intestine absorbs 10% of the water entering into the small intestine
Water absorption by the large intestineGenerally, small intestine and large intestine are at the core of ingestion or digestion of bodily nutrients
We have that the small intestine absorbed 90% of the water received while the the rest is passed to the large intestine
Hence, The large intestine absorbs the remaining 10% of the water
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Question: How does the number of wire coils on an electromagnet affect the strength of magnetic force?
do Hypothesis and the Reasoning for Hypothesis
PLS HELP
Answer:
here's your answer hope it helps you
Explanation:
the strength of magnet increase with increasing number of turns in the coil.
the strength of the electromagnet is directly proportional to the number of turns in the coil. if you double the number of turns, you double the strength of the electromagnet.
The number of wire coils on an electromagnet affects the strength, as the strength is directly proportional to the number of turns in the coil.
What is an electromagnet?An electromagnet is a type of magnet where an electric current creates a magnetic field. The wire that makes up an electromagnet is typically twisted into a coil. A magnetic field is produced by a current flowing through the wire and is concentrated in the hole at the center of the coil.
As the coil's turns grow, the magnet's strength does as well. The coil's number of turns directly relates to the electromagnet's strength. The electromagnet's strength doubles when the number of rotations is doubled.
Therefore, since the strength is inversely related to the number of turns in the coil, the number of wire coils on an electromagnet affects its strength.
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What is contained inside the nucleus of every cheek cell?.
The content of the nucleus of every cell is DNA
NucleusThe nucleus is an organelle present in all eukaryotic cells.
The organelle contains instructions for all cellular processes.
The instructions are stored as genes, which are coded for by sequences of deoxyribonucleic acids.
Thus, since the nucleus largely contains DNA, and other molecules such as proteins, the nucleus of every cheek cell would also contain DNA.
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During protein digestion, _____ are broken down into _____, which are then absorbed into the bloodstream and transported for use elsewhere in the body.
Answer:
Proteins then Amino Acids
Identify the microscope used in most high school biology classes.
In order to change an observable characteristic of an organism, one would only need to change the DNA ________.
Answer: Sequence
Explanation: DNA exists like a code and if you had a chain like ATGC and rearranged it to be AGCT, they could represent two very different forms of a trait like hair color, one is blond and one is brown, but they are both made of the same puzzle pieces.
In order to change an observable characteristic of an organism, one would only need to change the DNA sequence that codes for that characteristic.
How traits of an organism are determined ?Observable characteristics or traits of an organism are determined by the genes present in the organism's DNA. Changes to an organism's observable characteristics can occur when there are changes in the DNA sequence.
The DNA sequence provides instructions for the synthesis of proteins, which are responsible for the structure and function of cells and tissues in an organism.
A change in the DNA sequence, such as a mutation, can lead to changes in the amino acid sequence of a protein, which can alter its structure and function. If the protein is involved in a biochemical pathway that controls a particular trait, then the change in its structure and function can result in a change in the observable characteristic of the organism.
For example, the gene responsible for the production of melanin determines the color of an organism's skin, hair, and eyes. Any changes in the DNA sequence of this gene can affect the production of melanin, resulting in changes in the observable characteristics of the organism's skin, hair, and eyes.
Therefore, to change an observable characteristic of an organism, one would need to change the DNA sequence that codes for that particular characteristic.
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Red-green color blindness is caused by an X-linked recessive allele. Suppose a color-blind man and a woman with normal vision and no family history of color blindness married and had a daughter who was color blind and had Turner syndrome. Explain how this could happen citing which parent(s) could be responsible and where NDJ could occur.
What type of cells are responsible for photosynthesis?
Answer:
The chloroplast is the organelle in plant cells that is responsible for photosynthesis
Explanation:
thats it
What is the part of the flower with the pollen in it?
the part of the flower with pollen in it is the stamen
Answer:
The pollen producing part of a flower, usually with a slender filament supporting the anther. Anther: The part of the stamen where pollen is produced. Pistil: The ovule producing part of a flower. The ovary often supports a long style, topped by a stigma.
Explanation:
_____ is a binocular cue used to judge distance and depth based on the tension of the muscles that direct where the eyes are focusing.
Answer:
An important binocular depth cue is convergence, the inward turning of our eyes that is required to focus on objects that are less than about 50 feet away from us. The visual cortex uses the size of the convergence angle between the eyes to judge the object's distance.
Explanation:
non competitive inhibitor binds with which site of an enzyme?
In a population experiencing exponential growth, as the size of the population increases, the number of new individuals getting added to the population each generation remains the same each year.
a) true
b) false
Answer:
false
Explanation:
because some people pass on and it's not possible for humans to increase every decade
Which of the statements describe hydrogen bonding between water molecules or describe properties of water that lead to hydrogen bonding between water molecules?.
Answer:A water molecule is polar because it has a bent structure and its shared electrons are more attracted to the oxygen atom than the hydrogen atoms.
Explanation:
bc i am a gay asian
URGENT! 15 Points!
Answer questions 13-17 plz <3
Which of these correctly shows ecological succession in a lava field?
A.Soil is created. Moss and lichen arrive by birds to barren lava field. Monkeypod trees grow. Fountain grass grows.
B.Moss and lichen arrive by birds to barren lava field. Fountain grass grows. Monkeypod trees grow. Soil is created.
C.Soil is created. Moss and lichen arrive by birds to barren lava field. Fountain grass grows. Monkeypod trees grow.
D.Moss and lichen arrive by birds to barren lava field. Soil is created. Fountain grass grows. Monkeypod trees grow.
The ecological succession that occurs in a lava field is as follows:
Moss and lichen arrive by birds to barren lava field.Soil is created.Fountain grass grows.Monkeypod trees grow.What is ecological succession?Ecological succession refers to the series of changes that occur in a habitat gradually with new species replacing existing species or a barren habitat until the environment becomes more complex.
A lava field is a barren field where there are no species
The ecological succession that occurs in a lava field is as follows:
Moss and lichen arrive by birds to barren lava field; Soil is created; Fountain grass grows; Monkeypod trees grow.
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Meredith is 5-years-old. She has a genetic condition known as xeroderma pigmentosum, which makes her extremely sensitive to UV light. If she goes outdoors, she must have all her skin covered and wear a hat and sunglasses. Based on her condition she is most likely to ________. Select all that apply.
From what we know, if Meredith goes outside unprotected, she is most likely to develop skin cancer.
How does this happen?Meredith does not have natural protection against the UV light from the sun. This light causes mutations at a genetic level. These mutations cause the cell to grow rapidly and without end, turning it into a cancerous cell.
Therefore, we can confirm that among many other illnesses and side effects, Meredith is most likely to develop skin cancer due to the UV light.
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The vagus nerve operates under the control of the parasympathetic nervous system and causes the ________. *
Answer:
heart rate to decrease
Explanation:
Please mark me as brainliest
The type of membrane transport involving receptor-mediated endocytosis of low molecular weight molecules such as vitamins is known as
Answer:
potocytosis
Explanation: